Photon-bunching measurement after two 25-km-long optical fibers

doi:https://doi.org/10.1103/PhysRevA.71.042335

Title: Photon-bunching measurement after two 25-km-long optical fibers

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Abstract

To show the feasibility of a long-distance partial Bell-state measurement, a Hong-Ou-Mandel experiment with coherent photons is reported. Pairs of degenerate photons at telecommunication wavelength are created by parametric down-conversion in a periodically poled lithium niobate waveguide. The photon pairs are separated in a beam splitter and transmitted via two fibers of 25 km. The wave packets are relatively delayed and recombined on a second beam splitter, forming a large Mach-Zehnder interferometer. Coincidence counts between the photons at the two output modes are registered. The main challenge consists in the trade-off between low count rates due to narrow filtering and length fluctuations of the 25-km-long arms during the measurement. For balanced paths a Hong-Ou-Mandel dip with a net visibility of 47.3% is observed, which is close to the maximal theoretical value of 50% developed here. This proves the practicability of a long-distance Bell-state measurement with two independent sources, as, e.g., required in an entanglement swapping configuration in the scale of tens of kilometers.

Authors:

Halder, M; Tanzilli, S; Riedmatten, H de; Beveratos, A; Zbinden, H; Gisin, N ^[1]

Group of Applied Physics, University of Geneva, 1211 Geneva 4 (Switzerland)

Publication Date:: 2005-04-01

OSTI Identifier:: 20653292

Resource Type:: Journal Article

Journal Name:: Physical Review. A

Additional Journal Information:: Journal Volume: 71; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevA.71.042335; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947

Country of Publication:: United States

Language:: English

Subject:: 74 ATOMIC AND MOLECULAR PHYSICS; BEAM SPLITTING; BELL THEOREM; CONVERSION; CORRELATIONS; COUNTING RATES; DATA TRANSMISSION; DISTANCE; ENERGY LEVELS; FLUCTUATIONS; LITHIUM COMPOUNDS; MACH-ZEHNDER INTERFEROMETER; NIOBATES; OPTICAL FIBERS; PERIODICITY; PHOTONS; QUANTUM MECHANICS; VISIBLE RADIATION; WAVE PACKETS; WAVEGUIDES; WAVELENGTHS

Citation Formats


                    Halder, M, Tanzilli, S, Riedmatten, H de, Beveratos, A, Zbinden, H, and Gisin, N. Photon-bunching measurement after two 25-km-long optical fibers.  United States: N. p., 2005. 
        Web.  doi:10.1103/PhysRevA.71.042335.

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                    Halder, M, Tanzilli, S, Riedmatten, H de, Beveratos, A, Zbinden, H, & Gisin, N. Photon-bunching measurement after two 25-km-long optical fibers.  United States.  https://doi.org/10.1103/PhysRevA.71.042335

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                    Halder, M, Tanzilli, S, Riedmatten, H de, Beveratos, A, Zbinden, H, and Gisin, N. Fri .  
        "Photon-bunching measurement after two 25-km-long optical fibers".  United States.  https://doi.org/10.1103/PhysRevA.71.042335.

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@article{osti_20653292,

  title        = {Photon-bunching measurement after two 25-km-long optical fibers},

  author       = {Halder, M and Tanzilli, S and Riedmatten, H de and Beveratos, A and Zbinden, H and Gisin, N},

  abstractNote = {To show the feasibility of a long-distance partial Bell-state measurement, a Hong-Ou-Mandel experiment with coherent photons is reported. Pairs of degenerate photons at telecommunication wavelength are created by parametric down-conversion in a periodically poled lithium niobate waveguide. The photon pairs are separated in a beam splitter and transmitted via two fibers of 25 km. The wave packets are relatively delayed and recombined on a second beam splitter, forming a large Mach-Zehnder interferometer. Coincidence counts between the photons at the two output modes are registered. The main challenge consists in the trade-off between low count rates due to narrow filtering and length fluctuations of the 25-km-long arms during the measurement. For balanced paths a Hong-Ou-Mandel dip with a net visibility of 47.3% is observed, which is close to the maximal theoretical value of 50% developed here. This proves the practicability of a long-distance Bell-state measurement with two independent sources, as, e.g., required in an entanglement swapping configuration in the scale of tens of kilometers.},

  doi          = {10.1103/PhysRevA.71.042335},

  url          = {https://www.osti.gov/biblio/20653292},
  journal      = {Physical Review. A},

  issn         = {1050-2947},

  number       = 4,

  volume       = 71,

  place        = {United States},

  year         = {2005},

  month        = {4}

}

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